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EP 4 342 154 A1

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(43) Date of publication: 27.03.2024 Bulletin 2024/13 (21) Application number: 22727634.2 (22) Date of filing: 12.05.2022

(51) International Patent Classification (IPC):  H04L 61/5038(2022.01) H04L 61/5092(2022.01) H04L 61/5053(2022.01) H04L 101/622(2022.01) (52) Cooperative Patent Classification (CPC): H04L 2101/622; H04L 61/5038; H04L 61/5053; H04L 61/5092 (86) International application number: PCT/US2022/028925 (87) International publication number: WO 2022/245622 (24.11.2022 Gazette 2022/47)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 19.05.2021 US 202163190379 P 20.12.2021 US 202117556277 (71) Applicant: Cisco Technology, Inc. San Jose, CA 95134-1706 (US)	(72) Inventors: HENRY, Jerome Pittsboro, NC 27312 (US) BARTON, Robert, E. Richmond, BC V7C 5R6 (CA) ORR, Stephen Michael NY 12589 (US) (74) Representative: Jarrett, Daniel Phillip et al Kilburn & Strode LLP Lacon London 84 Theobalds Road London WC1X 8NL London WC1X 8NL (GB)